Model for curvature-driven pearling instability in membranes

Details Model for curvature-driven pearling instability in membranes Model for curvature-driven pearling instability in membranes

2007-07-17

arxiv.org/abs/0707.2573v1

Phys. Rev. Lett. 99, 088101 (2007)

Biology

Quantitative Biology

Quantitative Methods

Accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.99.088101

A phase-field model for dealing with dynamic instabilities in membranes is presented. We use it to study curvature-driven pearling instability in vesicles induced by the anchorage of amphiphilic polymers on the membrane. Within this model, we obtain the morphological changes reported in recent experiments. The formation of a homogeneous pearled structure is achieved by consequent pearling of an initial cylindrical tube from the tip. For high enough concentration of anchors, we show theoretically that the homogeneous pearled shape is energetically less favorable than an inhomogeneous one, with a large sphere connected to an array of smaller spheres.

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